596 LHE fOURNALVORYGEOLO GN. 
Thomas. This is introduced by a description of methods in this rela- 
tively new field. Incidentally there is brought out the applicability of 
such microscopic studies to secondary deposits, such as the occurrence 
of the microscopic foraminifera in glacial clays. ‘Twenty-nine species 
are described and fully illustrated. The chapter on sponges, grapto- 
lites and corals of the Lower Silurian formations is by N. H. Winchell 
and C. Schuchert and embraces descriptions and illustrations of nine- 
teen species. This is followed by a chapter on the Lower Silurian 
bryzoa by E. O. Ulrich, which is introduced by a discussion of termi- 
nology, methods of study, classification and geologic distribution. It 
embraces descriptions of about 150 species, a large percentage of which 
‘are new. ‘Twenty-eight lithographic plates, crowded with figures, are 
devoted to the illustration of this chapter. The final chapter is devoted 
to the Lower Silurian brachiopoda of Minnesota by N. H. Winchell and 
Chas. Schuchert. After a brief introduction upon preservation, distri- 
bution and terminology——the latter accompanied by very helpful dia- 
grammatic illustrations—an excellent systematic description is given 
of the brachiopoda represented in Minnesota, exbracing eighty-four 
forms, amply illustrated. Altogether the volume is a very important 
addition to the palzontology of the interior. : MRC AC: 
RECENT PUBLICATIONS. 
—ANNALES DE GEOGRAPHIE. Paris, 1895. 
—ANN. REPORT OF THE DEPT. OF MINES AND AGRICULTURE of New 
South Wales, 1894. 
—ARCHOLOGICAL INSTITUTE OF AMERICA—Thirteenth Ann. Report of 
the Managing Com. of the Am. School of Classical Studies at Athens, 
1893-4. 
—BaIn, H. FOSTER, Cretaceous Deposits of the Sioux Valley. From Vol. 
III., of Geol. Survey of Iowa, 1893. 
—BARuS CARL. Report on the Condensation of Atmospheric Moisture. 
Bull. No. 12 of the U. S. Weather Bureau. 
—Baur G. The Differentiation of Species on the Galapagos Islands and 
the Origin of the Group. Lectures delivered at the Marine Biol. Lab. 
at Woods Holl, Mass., 1894. 
—BULLETIN OF AM. PALAZONTOLOGY, No. 1—Claiborne Fossils, Gilbert 
D. Harris, Cornell Univ., 1895. 
—BULLITIN DU MusEUM D’HIstToRIE NATURELLE, No.1. Paris, 1895. 
